DSP56303 datasheet(265/292 Pages) FREESCALE

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Programming Sheets

DSP56303 User’s Manual, Rev. 2

Freescale Semiconductor

B-21

Figure B-12. Interrupt Control and Command Vector Registers

Application:

Date:

Programmer:

Sheet 4 of 5

HOST

5432

Host Side

RREQ

HF1

TREQ

HF0

INIT

HLEND

Interrupt Control Register (ICR)

Host Address: $0 Read/Write

Transmit Request Enable

DMA Off

0 = Interrupts Disabled

1 = Interrupts Enabled

DMA On

0 = DSP

→ Host

1 = Host

→ DSP

Host Flags

Write Only

Initialize (Write Only)

Host Little Endian

Receive Request Enable

DMA Off

0 = Interrupts Disabled

1 = Interrupts Enabled

DMA On

0 = Host

→ DSP

1 = DSP

→ Host

0 = No Action

1 = Initialize DMA

HDRQ

HREQ/HTRQ

HACK/HRRQ

HREQ

HACK

HTRQ

HRRQ

Reset = $00

*= Reserved, Program as 0

HC0

HC4

HC1

HC3

HC7

HC5

Command Vector Register (CVR)

HC2

Reset = $32

Contains the host command interrupt address

HC6

Host Vector

Contains Host Command Interrupt Address ÷ 2

Host Command

Handshakes Executing Host Command Interrupts

Host Address: $1 Read/Write

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